Computer crashes/freezes randomly, any suggestions?

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MageThief
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I'm getting tired of this.

My computer have been crashing/freezing on me randomly (mostly while gaming) for a loooong time now. The monitor goes black/or freeze with sound still running for a few seconds before it gets stuck in a loop, keyboard and mouse stop responding also. I have done all kinds of tests on the system and the hardware with no luck and all the drivers are up to date.
I have monitored the temperature and there is no problem with that.
Some times i can run the computer and play games for 10 hours with no problems and the next time the computer can crash just by looking at it (feels like it)
The memory i use is in the ASUS QVL list for approved memory, up to 4 memory's at the same time. The voltage on the memory is at 2.1.
I am running a Windows 7 Home premium 64bit operating system.

I have sent parts of the hardware for testing 2 separate times with no luck from the experts where i bought the computer.
The third time, this time, I sent the hole damn computer to them and after more than a week got this response today.

We cant find any problems with the system you sent us.
* The system gives image at first boot - OK
* Installation of the latest official graphic drivers Catalyst 10.2 - OK
* Stress test, 3DMarkVantage 30 loops - OK
* Stress test, FurMark 1.8.0 Stability Test, Xtreme Burning mode i 20h - OK
* Stress test, Prime95 25.5 i 5h - OK
The system have been running and stress tested for more than 30h and not given any sign of error.

So, now i will get it back in a day or two, and trust me, it will crash/freeze on me, that i can guarantee *[i]sight[/b]*

Any suggestion before i go and go mentally insane?

-<[ Damn Dirty Apes ]>- -<[ Kitanai Saru Yarou ]>- -<[ Jäklars Skitiga Apor ]>- -<[ Merde Souillé Singes ]>-

Vortex88
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Is this only happening during one game? Maybe the game files are corrupted. Try reinstalling it.

MageThief
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No it is not only happening during gaming, its just much more frequent.
And it does not matter if the game is freshly installed with or without patches, or its a game I have had installed since i first bought the computer.

I have also tried to change graphic cards with a friend and no changes there for me and my friend had no problems at all with my graphic card. it have been tested 2 times also on two different occasions by the company's (that i bought the computer from) technical department and they did not find any problems.

Tiv
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All they proved is that it can run things fine. However they are missing what the average person does with it. What about Torrents and Internet games? I've seen those programs overwhelm nic-cards and onboard ports causing the systems to lock and reboot. Some times those issues can be driver related. Also Trojans and anti-spyware programs can lock a system. Other times, more rare I've seen the power line the computer is on drops power at the circuit or the battery backup acts up.

I sleep fine at night knowing we are banning people who deserve it.  Tivon
Don't test my skills, I was trained by myself! Check out my Gaming Videos!

MageThief
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So do you think i should make some test with the network card that i am using (look in the list), switch between using a cable and wifi, should i test using just the on-board network card on the motherboard?
I also have the same problem playing single player games that do not use a online connection.
Also, do you think i should try to test my system with an UPS?

This is the system i am using

• 2 OCZ Platinum DDR2 PC6400 4096MB KIT, w/two 2048MB PC6400 XTC, CL5-5-5-4
• 1 Corsair Powersupply 750W Black,ATX/EPS, 140mm Fan, 8xSATA, SLI
• 1 Western Digital Caviar GP 500GB SATA2, 16MB 7200RPM
• 1 Sapphire Radeon HD 4870X2 2GB GDDR5, PCI-Express 2.0, 2xDVI/HDMI/HDCP
• 1 Sony NEC Optiarc DVD±RW burner AD-7203A, LabelFlash, Multirecorder(Ram), IDE, Bla
• 1 Asus M3N-HT Deluxe/Mempipe, nForce 780a SLI, Socket-AM2+, ATX, 3xPCI-Ex(2.0)x16
• 1 AMD Phenom 9850 Black Edition Quad-Core 2.5 GHz Boxed, 4MB Cache, Socket AM2+, 1
• 1 D-Link Xtreme N PCI Express Desktop Adapter, PCIe, 802.11n ( draft 2.0 )
• 1 Antec Nine Hundred black miditower

Tiv
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Did those people look into any of the crash logs?

Off the top of my head, looking at the hardware check to see if they have new drivers for the D-Link. Or switch to some generic drivers, whatever changes it is fine.

Even single player games use the Internet, such as with STEAM.

My brain is telling me to question the motherboard.

Try turning off the Cool n Quiet feature in the BIOS.

Could be nForce driver issues or firewalls.

One more question do you have a sound card?

MageThief
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Hey, took some time but i get so frustrated with my computer that i just sink in to my own little world and try to ignore it :P

Anyhow, I got the latest drivers for all the hardware on my computer and router.
The "Cool n Quiet" is disabled.
I use the onboard audio.
Don't know if they looked in to any logs.

I also brought my hole computer to a friends house for a hole week and played about 10 hours every day. I had less problems but still it crashed about 5-7 times during that week. For me that's nothing :(

Did a test on my hard drive also, took about 2-3 hours and no error there.

Been talking to some friends and they all thin that it might be the motherboard that is the problem.
I have testing different settings in the bios to see if I get some response from the memories, graphic card and stop the crashes/freezes, no change at all.
The memory is still running to slow and showing to low voltage than what i have change in the bios.
Now i also saw that the graphic card is not running at is supposed speed either.
I tried to change the voltage but no change when looking at those programs.

This should be the right stats for the memories and graphic card:
Memory: 800 MHz ( PC2-6400 ) 2.1 volt, CL5-5-5-4
Graphic: GPU clock 750 MHz, Memory clock 900 MHz and 2GB of memory.

This is what info i get when looking at CPU-Z, Speccy and in the Catalyst Control Center:
Memory: 401.8 MHz ( PC2-6400 ) 2.1 volt, CL6-6-6-18
Graphic: GPU clock 507 MHz, Memory clock 500 MHz and 1GB of memory.

MageThief
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Ok I found info on AMD´s homepage that when in 2D mode the graphic card lower its performance so the life span will increase and when in 3D mode it will go up to the advertised speed and performance.
Good, graphic card of the list of possible suspect then :)

Heard from someone that CPU-Z is showing the Memory I/O bus speed which is 400Mhz.. since it is Double data rate memory, you multiply that frequency times two...
I have 8 GB of memory so I use 4 memory sticks and in the boot screen I can see that they are in unganged mode, does this affect something or?

If it now is the motherboard that is the problem, should i contact the place where i bought it and get it replaced. They have tested it but they found no problems, is there some other way of testing to get the problems I am having. I have also been testing with different burn and stress test and benchmarking tools and i had no problems. But when playing or watching videos the problems pops it ugly head out.
 

Tiv
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The stuff they used to test your system are just benchmarks. What games are you playing when this happens? What other softwares are you running at the time?

The black screen normally tells me the video card froze. But I've seen the power supply trip off because it dropped voltages. Sometimes you can swap the power cables around to fix that problem. I've had bad motherboards with IRQ conflicks that never seem to go away until I hammer it into dust and buy a replacement board.

You might want to underclock your memory running speeds or leave them at Auto. Also if you have 4 sticks of memory and they are not all the same type, remove the lesser two sticks, mixing memory is a bad idea.

dustyschaffner
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are you harddrives in a cool cage with airflow?

i used to have this problem with my computer and it turns out, my harddrives were overheating and shutting down, the solution: that 5 1/4 cage i hand made that you can see in my mod log.

hardware tests like prime 95 just load up on the ram correct? leaving no HDD activity so the drives dont heat up and shut off for the tech team, but they will shut down ingame where your harddrives are frequently exchanging data

victec
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I'll say its either bad memory or memory compatibility, OCZ normally doesn't work that well with Asus board, YES, it's the brand. I've seen this happen quite often.

Try to use seatool to check the hard drive as well.

also see if there's any swollen caps on the motherboard.

MageThief
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Hey.

No problems with the HD and no heat problems with them either.

Just talked to the support at the computer store, they suggested to try cool down the North-bridge and if it would be that one that overheated and freaked out. But after testing nothing changed.
So now i will send the Motherboard back to them and i talked them in to testing the MB while gaming and they will. So its probably leaning towards that i will get a new MB.
Lets just hope that they will find a problem with the MB

MageThief
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Update.

they will send me a "Gigabyte GA-MA790X-UD3P" that i will test and hopefully the problems will no occur and then i will return my old "Asus M3N-HT Deluxe/Mempipe" and if the problem continue i will send the new one back and we are back to zero.

LOOP
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try when the computer craches to remove power supply and feel the tempature on the RAM modules.

i have 4 ram modules and i had to get a Fan to blow down onto the Ram to keep my computer from crashing.  GL.

icebreaker
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Faulty Power supply or Ram is the most likely cause. But it can also be your motherboard, the voltage regulators might be broken.

A friend of mine had the same problem, pc became stuck after a while but especially when gaming.

He went to the store and they changed the video card but no luck. They tested it with another power supply and ram but still no luck, they didn't test the motherboard. So he brought it to me and i found out pretty quickly that the voltage regulators where broken, replaced the motherboard and everything was fine.

When you are gaming the parts in your pc ask for more power, if the voltage regulators are broken it can't handle the load and crashes.